It was a rough night to not be CBS last night, as long-running hit series Big Brother returned to rescue CBS from Summer obscurity. The series debuted at 1.7, down two tenths from 2016 but still a very strong result. It was a huge improvement on the repeats CBS had been programming there, and it was 7 tenths above its closest competitor. Its closest competitor was MasterChef, which was unaffected by the return of Big Brother. MasterChef's lead-out, The F Word, was down to a rough 0.6. It's the second newbie reality on Fox to dip to 0.6 this week, which isn't exactly promising for the network. On NBC, Forever Young was down a tenth to 0.9, which is an okay but not great result for the new show. The Carmichael Show also ticked down, tying its season low. The CW had anemic repeats as usual, with ABC repeats all down by at least one tenth each. The lower ABC repeats led into another low episode of To Tell The Truth.